Help please

I am knitting my 1st sweater. Hooray ! Directions for front say
sl 1 rib 5sts(front band) work in ST st to end
next row wrk in ST st to last 6 sts, rib to end

ok, what is a rib stitch? I understand the rest

Over 5 stitches, it’s k1,p1,k1,p1,k1 on one side and p1,k1,p1,k1,p1 on the other side.